LT1785IS8#TRPBF Linear Technology, LT1785IS8#TRPBF Datasheet - Page 9

• Manufacturer Part Number: LT1785IS8#TRPBF
• Description: IC TXRX RS485/RS422 60V 8-SOIC
• Manufacturer: Linear Technology
• Type: Transceiverr

Specifications of LT1785IS8#TRPBF

• Number Of Drivers/receivers: 1/1
• Protocol: RS422, RS485
• Voltage - Supply: 4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Data Rate: 250Kbps
• Interface Circuit Standard 1: RS-422/RS-485
• Number Of Receivers: 1
• Number Of Transmitters: 1
• Number Of Transceivers: 1
• Data Transmission Topology: Multidrop/Multipoint
• Receiver Signal Type: Differential
• Transmitter Signal Type: Differential
• Single Supply Voltage (typ): 5V
• Single Supply Voltage (min): 4.75V
• Single Supply Voltage (max): 5.25V
• Dual Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Supply Current: 9mA
• Power Supply Requirement: Single
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 8
• Package Type: SOIC N
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SWITCHING TIME WAVEFORMS
A – B
A, B
A, B
RO
RO
RE
DI
DE
RO
–V
V
–V
V
V
V
5V
0V
5V
0V
V
5V
0V
V
0V
OD2
OD2
5V
0V
5V
OH
0V
OL
OH
B
A
O
O
OL
V
O
1/2 V
O
Figure 8. Receiver Enable and Disable Times
10%
t
r
Figure 6. Driver Enable and Disable Times
Figure 7. Receiver Propagation Delays
1.5V
t
PHL
Figure 5. Driver Propagation Delays
90%
t
PLH
t
SKEW
1.5V
1.5V
f = 125kHz, t
0V
1.5V
1.5V
2.3V
2.3V
t
t
1.5V
t
t
ZL(SHDN)
ZH(SHDN)
ZL(SHDN)
ZH(SHDN)
f = 125kHz, t
f = 125kHz, t
f = 125kHz, t
OUTPUT NORMALLY HIGH
V
OUTPUT NORMALLY LOW
r
OUTPUT NORMALLY HIGH
OUTPUT NORMALLY LOW
, t
DIFF
, t
≤ 10ns, t
, t
, t
ZL
ZH
ZL
ZH
= V(A) – V(B)
r
r
f
≤ 10ns, t
≤ 10ns, t
≤ 10ns
r
≤ 10ns, t
OUTPUT
INPUT
f
f
≤ 10ns
≤ 10ns
f
≤ 10ns
t
PHL
t
t
LZ
HZ
t
t
HZ
t
LZ
f
t
PLH
1.5V
LT1785/LT1785A/
90%
1.5V
1.5V
0.5V
0.5V
10%
0.5V
0.5V
LT1791/LT1791A
t
SKEW
0V
1.5V
1/2 V
O
1785/91 F05
178591 F08
178591 F06
178591 F07
178591fc
9